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支持向量机所做的不仅是在这两个类之间绘制一条线，而是考虑一个给定宽度线的区域。以下是它的外观示例：

# creating line space between -1 to 3.5

xfit = np.linspace(-1, 3.5)

# plotting scatter

plt.scatter(X[:, 0], X[:, 1], c=Y, s=50, cmap='spring')

# plot a line between the different sets of data

for m, b, d in [(1, 0.65, 0.33), (0.5, 1.6, 0.55), (-0.2, 2.9, 0.2)]:

yfit = m * xfit + b

plt.plot(xfit, yfit, '-k')

plt.fill_between(xfit, yfit - d, yfit + d, edgecolor='none',

color='#AAAAAA', alpha=0.4)

plt.xlim(-1, 3.5);

plt.show()